Method for modifying the surface of finely divided particles by the application of organofunctional polysiloxanes
First Claim
1. A method for modifying the surface of a particle which comprises applying to the particle, an organosiloxane with ester groups and long-chain alkyl groups linked over carbon atoms to silicon atoms and having the general formula ##STR4## wherein R1 is an alkyl group with 1 to 4 carbon atoms or a phenyl group, with the proviso that at least 90% of the R1 groups are CH3,R2 is selected from the group consisting of R1, R3 and R4 with the proviso that 50 to 99% of the R2 groups have the same meaning as R1 the remaining groups being R3 and R4, whereby each R3 is a group of the formula --(CH2)n --CO--OR5, where R5 is an alkyl group with 1 to 4 carbon atoms and n is a number from 6 to 16, and R4 is a linear or branched alkyl group with 6 to 30 carbon atoms, with the proviso that(a) the ratio of R3 to R4 is within the range of 1:
- 25 to 10;
1,(b) at least one R3 group and at least one R4 group must be present in the average molecule,a is a number from 1 to 500, andb is a number from 0 to 10.
2 Assignments
0 Petitions
Accused Products
Abstract
A method for modifying the surface of finely divided particles, such as pigments and filler or glass fiber, is described. The method utilizes organopolysiloxanes with ester groups and long-chain alkyl groups, which are linked over carbon atoms to silicon atoms.
-
Citations
4 Claims
-
1. A method for modifying the surface of a particle which comprises applying to the particle, an organosiloxane with ester groups and long-chain alkyl groups linked over carbon atoms to silicon atoms and having the general formula ##STR4## wherein R1 is an alkyl group with 1 to 4 carbon atoms or a phenyl group, with the proviso that at least 90% of the R1 groups are CH3,
R2 is selected from the group consisting of R1, R3 and R4 with the proviso that 50 to 99% of the R2 groups have the same meaning as R1 the remaining groups being R3 and R4, whereby each R3 is a group of the formula --(CH2)n --CO--OR5, where R5 is an alkyl group with 1 to 4 carbon atoms and n is a number from 6 to 16, and R4 is a linear or branched alkyl group with 6 to 30 carbon atoms, with the proviso that (a) the ratio of R3 to R4 is within the range of 1: - 25 to 10;
1,(b) at least one R3 group and at least one R4 group must be present in the average molecule, a is a number from 1 to 500, and b is a number from 0 to 10. - View Dependent Claims (2, 3, 4)
- 25 to 10;
Specification